Data Sheet
April 2008
Lineage Power
5
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 50 W
QW050F1 and QW075F1 Power Modules:
Characteristic Curves
The following figures provide typical characteristics for the power modules. The figures are identical for both on/off
configurations.
8-2959 (F)
Figure 1. Typical QW050F1 Input Characteristics at
Room Temperature
8-3032 (F)
Figure 2. Typical QW075F1 Input Characteristics at
Room Temperature
8-2960 (F)
Note: Pending improvement will add 1% to the above curves.
Figure 3. Typical QW050F1 Converter Efficiency
vs. Output Current at Room Temperature
8-2961 (F)
Note: Pending improvement will add 1% to the above curves.
Figure 4. Typical QW075F1 Converter Efficiency
vs. Output Current at Room Temperature
1.4
1.0
20
INPUT VOLTAGE, VI (V)
INPUT
CURR
ENT,
I
I(A
)
0.8
0.6
0.4
0.2
0.0
25
30
35
40
45
50
55
75
1.2
60
65
70
IO = 10 A
IO = 6 A
IO = 1 A
2.5
2.0
1.5
0.5
0.0
20
30
40 45 50 55 60 65 70
INPUT VOLTAGE, VI (V)
INPUT
CURR
ENT,
I
I(A
)
75
1.0
35
25
IO = 15.0 A
IO = 8.0 A
IO = 1.5 A
82
80
2
OUTPUT CURRENT, IO (A)
EF
FICI
EN
CY,
η(%
)
79
78
77
73
72
34
56789
10
81
VI = 36 V
VI = 48 V
VI = 75 V
74
75
76
SEE NOTE
82
80
2
OUTPUT CURRENT, IO (A)
EFFIC
IENCY,
η(%
)
79
78
77
73
72
34
567
9
11
15
81
74
75
76
13
10
812
14
VI = 36 V
VI = 48 V
VI = 75 V
SEE NOTE